Clamp



R. E L E E H S M C CLAMP.

Patented Oct. l0, 1882. -F I- INV ENT-@IIL- UNITED' STATES PATENTOFFICE.

CHARLES M. SHEELER, OF BALTIMORE, MARYLAND.

CLAMP.

SPECIFICATION forming part of Letters Patent No. 265,640, dated October10,1882.

Application filed July 13, 1882.

To all whom it m dy concern:

Be it known that I, CHARLES M. SHEELER, of the city of Baltimore, andState of Maryland, have invented certain Improvements in Clamps, ot'which the following is a speciiication.

This invention relates to an improved device for holding the two or moreparts ot' a moldingtlask together, and for other purposes 5 and itconsists in forming the clamp in two hollow threaded parts or sectionsand connecting the same by means of a screw having right and left handthreads.

It further consists in a peculiar formation of the adjoining ends ot'the two members of the clamps, whereby in the movement of the screw theyare retained in the same relative positions.

In the further description of my invention, which follows, reference ismade to the accompanying drawings, forming a part hereof, and in which-FigureIis a perspective view of a flask, showing two of my improvedclamps in position. Figs. II, III, IV are detail views of parts of theinvention on an enlarged scale.

Similar letters ot' reference indicate similar parts in all the views. 1

A and B are the two sections of the clamp, having respectively aninterior right and left hand thread.

C is the screw, having threads correspond ing to those in the twosections of the clamp. The ends of the screw are made polygonal, or

(No model.)

of some other shape that will admit of the screw being turned by meansot awrench, D. (Shown in Fig. I.)

The inner ends of the camp-sections are notched to interlock, andthereby retain thev said sections in a common relative position. Thenotches and the correspondingly-shaped projections formed by the notchesare of such length as to admit of considerable extension and contractionof the device without detaching the two parts ot' the same, as will beseen by reference to the drawings.

I do not claim broadly a clamp having two sections interiorly threadedin opposite directions, combined with a stem having a right and lefthand thread, the said sections being provided with means to retain themin a common relative position, as such construction is found in variouskinds ot' Wrenches; but

What I do claim is- A clamp which consists ot the sections A and B,interiorly threaded in opposite directions, having their inner endsnotched, so as to interlock, and thereby prevent independent rotation ofthe said sections, and adapted to admit of the longitudinal extensionand contraction of the same, combined with the screw C, substantially asspecified.

CHARLES M. SHEELER.

Witnesses ED J. DIGGs, JOHN WILLIAMS.

